How to handle wet plaster? What can be done to speed up renovation works


For bricklayers, plasterer and painters the autumn/winter season is full of challenges. Progress of many jobs depends on the weather conditions which, as we know, can be very changeable at this time of year. However, despite low temperatures, strong winds and frequent rainfall workers are capable of dealing with the onerous and omnipresent humidity.

It often turns out that finishing works in a building, painting a flat, renovating works inside facilities pose as many problems as construction works outside. It results from the fact that water is a commonly used component of mortars, paints or concrete. Unfortunately, it is very difficult to remove excess water from renovated areas in the autumn/winter season. Damp floors or walls prevent the performance of subsequent works, which causes delays in the realization of the entire project. In such situations it is necessary either to heat the area intensely and ventilate it at the same time or to eliminated dampness using popular dehumidifiers.

Portable condensation dehumidifiers are devices commonly used at construction sites – they are effective at eliminating humidity in rooms, regardless of the temperature outside. Condensation drying consists in removing water vapour from air by cooling it below the dew point (the dew point is the temperature at which water vapour condenses into water. Water obtained as a result of condensation in the evaporator is removed into a tank and the dried air is released at a temperature several degrees higher than the temperature of the air which is sucked in (usually dry air is 3-8°C warmer). Dry and warm air considerably speeds up the process of water evaporation from damp walls or floors. The method consisting in drying the air is much more effective and more economical than, e.g. the method consisting in heating and ventilating a room (in which the power consumption is much higher). Dehumidifiers make it possible to minimize the side effects characteristic of drying with hot air, such as discolorations on surfaces or cracking walls.

Condensation dehumidifiers are comfortable to use and the list of their applications is very long. They include very efficient models – designed especially for industrial uses as well as smaller ones adapted for typical household needs. However, regardless of the fact where a dryer will be used it needs to be operated properly.




It needs to be remembered that the room where it is going to work should be closed to avoid an inflow of humid air from outside. The dehumidifier should not be placed too close to the walls, as this may reduce its efficiency due to a hindered flow of air. The device should preferably be placed in the middle of the room or at least 20-50 cm from the walls or other obstructions. The best effects can be achieved only in this way. It needs to be remembered that these devices may not be used when the room temperature is very low (lower than 5°C). The drying time by means of these devices is from several hours to several days. It all depends on the temperature, the cubic capacity of the room, the humidity level and the capacity of the dryer.

Numerous models of condensation dehumidifiers are available on the market – they are adjusted to specific tasks. While choosing the right the user should consider its capacity needs, the range of temperatures at which it can operate and power consumption. It is certainly useful to consult a specialist who will surely help you to choose a suitable device for specific conditions. Detailed information about dehumidifiers can be found at dehumidifiers page.